ibapi 2.12.0

A Rust implementation of the Interactive Brokers TWS API, providing a reliable and user friendly interface for TWS and IB Gateway. Designed with a focus on simplicity and performance.
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//! Common StreamDecoder implementations for WSH module
//!
//! This module contains the StreamDecoder trait implementations that are shared
//! between sync and async versions, avoiding code duplication.

use crate::common::error_helpers;
use crate::messages::{IncomingMessages, RequestMessage, ResponseMessage};
use crate::subscriptions::{DecoderContext, StreamDecoder};
use crate::wsh::*;
use crate::Error;

use super::decoders;

impl StreamDecoder<WshMetadata> for WshMetadata {
    const RESPONSE_MESSAGE_IDS: &'static [IncomingMessages] = &[IncomingMessages::WshMetaData, IncomingMessages::Error];

    fn decode(_context: &DecoderContext, message: &mut ResponseMessage) -> Result<Self, Error> {
        match message.message_type() {
            IncomingMessages::WshMetaData => decoders::decode_wsh_metadata(message.clone()),
            IncomingMessages::Error => Err(Error::from(message.clone())),
            _ => Err(Error::UnexpectedResponse(message.clone())),
        }
    }

    fn cancel_message(_server_version: i32, request_id: Option<i32>, _context: Option<&DecoderContext>) -> Result<RequestMessage, Error> {
        let request_id = error_helpers::require_request_id_for(request_id, "encode cancel wsh metadata message")?;
        super::encoders::encode_cancel_wsh_metadata(request_id)
    }
}

impl StreamDecoder<WshEventData> for WshEventData {
    const RESPONSE_MESSAGE_IDS: &'static [IncomingMessages] = &[IncomingMessages::WshEventData, IncomingMessages::Error];

    fn decode(_context: &DecoderContext, message: &mut ResponseMessage) -> Result<Self, Error> {
        match message.message_type() {
            IncomingMessages::WshEventData => decoders::decode_event_data_message(message.clone()),
            IncomingMessages::Error => Err(Error::from(message.clone())),
            _ => Err(Error::UnexpectedResponse(message.clone())),
        }
    }

    fn cancel_message(_server_version: i32, request_id: Option<i32>, _context: Option<&DecoderContext>) -> Result<RequestMessage, Error> {
        let request_id = error_helpers::require_request_id_for(request_id, "encode cancel wsh event data message")?;
        super::encoders::encode_cancel_wsh_event_data(request_id)
    }
}

#[cfg(test)]
mod tests {
    use super::*;
    use crate::common::test_utils::helpers::assert_decode_surfaces_tws_error;

    #[test]
    fn test_wsh_metadata_decode_error_message() {
        assert_decode_surfaces_tws_error::<WshMetadata>(10089, "Requested market data is not subscribed");
    }

    #[test]
    fn test_wsh_event_data_decode_error_message() {
        assert_decode_surfaces_tws_error::<WshEventData>(10089, "Requested market data is not subscribed");
    }
}